NRE_WindowStyle.hpp

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     #pragma once

     #ifdef _WIN32                           // Windows
        #include <Windows.h>
     #elif __linux__                         // Linux
        #include <X11/Xlib.h>
     #else
        #error "Not Supported Yet or Unknown compiler"
     #endif

     #include <utility>

     namespace NRE {
         namespace Graphics {

             class WindowStyle {
                 private :  // Fields
                    unsigned int style;

                 public :   // Methods
                    //## Constructor ##//
                        inline WindowStyle(unsigned int s = BASIC) : style(s) {
                        }

                    //## Copy Constructor ##//
                        WindowStyle(WindowStyle const& ws) = default;

                    //## Move Constructor ##//
                        WindowStyle(WindowStyle && ws) = default;

                    //## Deconstructor ##//
                        ~WindowStyle() = default;

                    //## Methods ##//
                        #ifdef _WIN32                           // Windows

                            DWORD toNativeStyle() const;
                        #elif __linux__                         // Linux
                            struct NativeWindowHints {
                                unsigned long flags;
                                unsigned long functions;
                                unsigned long decorations;
                                long inputMode;
                                unsigned long state;
                            };

                            static constexpr unsigned long HINTS_FUNCTIONS   = 1 << 0;
                            static constexpr unsigned long HINTS_DECORATIONS = 1 << 1;
                            static constexpr unsigned long DECOR_BORDER      = 1 << 1;
                            static constexpr unsigned long DECOR_RESIZEH     = 1 << 2;
                            static constexpr unsigned long DECOR_TITLE       = 1 << 3;
                            static constexpr unsigned long DECOR_MENU        = 1 << 4;
                            static constexpr unsigned long DECOR_MINIMIZE    = 1 << 5;
                            static constexpr unsigned long DECOR_MAXIMIZE    = 1 << 6;
                            static constexpr unsigned long FUNC_RESIZE       = 1 << 1;
                            static constexpr unsigned long FUNC_MOVE         = 1 << 2;
                            static constexpr unsigned long FUNC_MINIMIZE     = 1 << 3;
                            static constexpr unsigned long FUNC_MAXIMIZE     = 1 << 4;
                            static constexpr unsigned long FUNC_CLOSE        = 1 << 5;

                            NativeWindowHints toNativeStyle() const;
                        #endif

                    //## Assignment Operator ##//
                        WindowStyle& operator =(WindowStyle const& ws) = default;
                        WindowStyle& operator =(WindowStyle && ws) = default;

                    //## Shortcut Operator ##//
                        WindowStyle& operator |= (WindowStyle const& ws);

                    //## Bitwise Operator ##//
                        WindowStyle operator |(WindowStyle const& ws) const;
                        unsigned int operator &(unsigned int ws) const;

                public :    // Static
                    static constexpr unsigned int BASIC      = 0b000;   
                    static constexpr unsigned int CLOSEABLE  = 0b001;   
                    static constexpr unsigned int RESIZEABLE = 0b010;   
                    static constexpr unsigned int FULLSCREEN = 0b100;   
             };
         }
     }